Pulp-grindstone.



H. E. BELLERSE. f

PULP GRINDSTONE.

APPLICATION FILED'MAR` 24. 1915.

1,142,296@ I Patentedaune 8,1915;

Suma/13:1

estaca.

PULP-GBINUSIONE.

Specification of Letters Patent.

Eatented June 8, 1915.

Application tiled Hatch 24:, 1915. Y Serial No. 16,586.

To all whom it may concern:

Be it known that I, HENRI E. Burmese, a citizen of the United States of America, and a resident of Lincoln, county of Grafton, State of New Hampshire, have invented certain new and useful Improvements in Pulp-Grindstones, of which the following is'. a full and clear specification, reference being had to the accompanying drawlngs, in which- Figure 1 is a radial section 'of grindstone constructed in accordancewith one embodiment of my invention; Fig. 2 a side elevation of the same.

In that Iclass of pul grindstones in which the stones are clampev in fplace on the .shaft by vmeans of.' a pair o clamping threaded on the shaft, it, frequently ha pens that the threaded parts become Nso firmly stuck together. by rust, etc., that the disks haveto ,be broken up in order -to removethem from the shaft and enable the stone to be replaced a new one.

It 1s the' cbJect of my present invention to so construct the clamping devices that the' disks may be readily taken apart and removed sectionallyif they become stuck on the threaded shaft, thereby making it an easy matter to remove the stone while at the 40 enlarged central op same time avoiding the loss of the disks or ianges. Y Y

In the drawing, a designates the stone, b the usual' shaft provided with the usual right and left-hand threads, and c the two clamping disks threaded on the shaft and adapted to clamp the stone between them in the usual manner.

In the form of device shown, the body d of the disk is cast in a sinl; piecedvith an f a pted to receive a hlb h radially divide into two parts, and interiorly threaded. This hub is provided with an annular "shoulder which faces inwardly toward the stone, and abuts against l 4 5 an annular shoulder formed in the hub-receiv-- ing hole. From this shimlderinwardly the exterior of the hub tapers and this tapered exterior of the hub fits against a similarly inclined or ,conical part of the hub aperture. To vprevent the hub turning independentlV of the disk .or flange, akey is used.

flange or disk of thisjconstruction is screwed the stone.

- the stone.

up against the stone in the usual manner, but instead of bearing directly against the stone, a filler k of wood is used between the inner face of the disk and the outer face of too tightly tothe shaft to be uhscrewed in the usual manner, a sectional removal of the disk is accomplished by first removing the wood filler piece or pieces lr: at both' sides of space between the other -disk and the mijncent side of therstone to enable the disk @.dy d2 to be pushed inwardly ofi the 'nut-like hub far enough to permit the two parts thereof to be jarred loose from the shaft and removed separatelyl from the eye or hole in the disk, thus releasing'the disk hotly and enabling the stone to be readily slipped of the end of the shaft. i

It will be observed that a feature of im portance lies in tapering the hub section and having the same fit into a tapering concentric hole in the outer section, as in this way it will require buta comparatively sli ht initial movement of the outer section to ree it from the hub section, thereby rendering it unnecessary to use -any thicker packing strips k than are usually employed.

Having thus described my invention, what I claim is: I

In combination with a threaded shaft, a grindstone, iiller pieces and a pair of disks threadedon vsaid shaft so .as to clamp the stone, each of saiddisks being constructed of two concentric sections, one inserted in the other, the inserted section being threaded internally for engagement with the shaft and tapered inwardly externally to fit a correspondingly tapered opening in the outer section, means being provided for keying the two parts together, for thepurpose .set forth.

In testimony whereof I hereunto aiix my signature.

/ HENRY E. BELLEROSE.

This iller can be chopped out,

If a disk of this type is stuck 

